Air-mixing device



Dec. 18 E923. 11,477,988

H. WEHR ET AL.

AIR MIXING DEVICE Filed Jan. 14. 1922 2 Sheets-5heet 1 NVE/VTORS We 1' W A TTOR/VEYS Dec. 18 1923. Lfll g J I H. WEHR ET AL AIR MIXING DEVICE Filed Jan. 14. 1922 2 Sheets-Sheet 2 ATTORNEYS Patented 18 1923.

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1 Application filed January 14, 1923. Serial No. 529,820.

To all whom it may concern:

" Be it known that we, HnNnYWnm; and

JOSEPH GIPINEAU, citiiens of the United States, and residing, res ctively,-at'Morris Park, in the count of ueens and State of New York, and oodhaven, in the county of Queens and State of New York, have invented certain new and useful Improvements in Air-Mixin Devices, of which the following is a speci cation.

Our invention relates to air mixing devices for internal combustion engines, vand it consists in the combinations, constructions and arrangements herein described and claimed.

An object of our invention is to provide an air mixing device which is adapted to be placed between a carburetor and the inlet of the intake manifold of the, engine to which applied and which is provided with means for supplying air to the carburetted mixture passing into the intake manifold to vary the proportions of air and other constituents of the combustible mixture as required to insure the delivery of a satisfactory inixtureto the combustion chamber of the engine at all times, irrespective of the .speed of the engine.

A further object of the invention is to provide a device of the character described which has means operable by the engine to which the device ,is applied to control the flow of air through-the device in such hit manner that the volume of indrawn air is decreased asfgtheifspeed of the en ine is increased beyond a determined sp A further object of our invention is to provide a device having means for conducting a fluid, suchas air, into union with a carburetted mixture passing into the intake manifold of an engine and for diffusing the indrawn fluid through thecarburetted mixture to insure the intimate and uniform commingling of the indrawn fluid and the carburetted mixture.

A still further object of the invention is to provide a device which is simple in construction, is adapted for application to en-;

gines of various types of automotive vehicles without any change in the construction'of such engines being required, and which operates to efl'eot a great saving in the fuel required in the development of a given amount or ower.

Other obgects and advan will be ap-,

manifold, portions of the carbureter and manifold being shown,

Figure 2 ice section along the line 2-2 of Flgure 1,

. Figure 3 is an enlar perspective view of a fragmentary portion of a plate comprised in the device, showing a valve seat and-a valve adapted to cooperate therewith,

I Figure 4 is a section through the mechanism shown in Figure 1, the view being taken substantially at right angles to Figure 2,

Figure 5 is a perspective view of the embodiment of the invention shown in the preceding views, I

Figure 6 is a perspective view of a modified form of plate embodied in the same invention as that illustrated in the i i views.

eferring now to the drawings and more particularly to Figures 1 to 5, inclusive, thereof, the numeral 1 denotesa carbureter of a well known t pe of construction and 2 designates the in ct portion of an intake manifold to which-the carburetor 1 is ordinarily attached through the agency of the co-operating flanges 3 and 4, res ectivel provided on the carbureter and inta e mamfold. In earl-lying outour invention we provide a flat p ate 5 conforming in contour with the flanges 3 and 4 and having formed therethrough an opening 6 adapted to register with the outlet of the carbureter 1 and with the inlet of the intake manifold. The late 5 is secured between the flanges 3 and 4 1 y bolts 7 or like fastening means.

y coinciding wit the (ii-- Oil plate 5 into the opening 6,

ameter of the opening 6. It is to be noted that the inner diameters of the ducts 12 and 13 are substantially the same as those of the bores and 11 and that the pro in essential res cts and in Fig. 3 the hos '9 is illustrate to advantage. It will be observed that diametrically opposed notches or grooves 16-16 are formed in the outer end thereof. Similar notches are provided for the boss 8 and have been indicated by the same reference numerals. A tubular valve c'asin 17 is connected to the boss 9 by means 0 a coupling 18 which threadedly engages both the boss 9 and the tubular valve casin A valve 19 is slidably disposed within the tubular valve casing 17 and, as illustrated to advantage in Fig. 3, .l fith general shape of a triangular prism 'forme with the ends thereof slightly rounded at 2020. The valve 19 floats be tween the end of the boss 9 and an annular shoulder 21 formed to extend inwardly from the inner wall of the valve casing 17 at a point somewhat nearer the outer end of the latter than the inner end thereof. The

rovision of the shoulder 21 reduces the re of the valve casing, as indicated at 22. The "reduced bore 22 is enlarged diametricall" and threaded adjacent to its outer en at 23 for engagement with a pet cock 24..

A valve casing 25 is connected with the boss 8 by a couplin 26 and a valve 27 floats between the en of the boss 8 and an internal annular shoulder 28. The valve 27 is precisely identical with the valve 19 and cooperates with the boss 8 and the shoulder 28 in the same manner as the valve 19 co-operates with the boss 9 and the shoulder 21. A reduced bore 29 leads through the shoulder 28 to the outer end of the valve casing 25 and is formed to flare outwardly at its end, as best seen in Fig. 2.

It will be noted that the valve casings 17 and 25 are threaded for practically their entire len h and that the couplings 18 and 26 are li ewise threaded for practically their entire length to permit of a relatively great lon itudinal movement of the valve casings re atively tothe bosses to which .attached. In order that such movements may be accomplished conveniently, integral enlargements 3031, respectively, are formed on the valve casings 17 and 25 and are provided with faces, such as indicated at 32 (see Fig. 5) adapted to be engaged by a wrench. Each of the valve casings 17 and 25 is provided with a jamb nut 33 in threaded engagement therewith and adapted to be moved into contact with the end of the coupling to which the valve casing applied is idle.

is attached to releasably lock the valve casing in adjusted plositlon with respect to the boss with whic associated.

, A street L 34 threadedly engages the valve casing 25, at 35, and is engaged at its outer end by an elbow 36 having one arm thereof arra ed in substantially vertical position.

A coc 37 is attached to the upright-end of 'the elbow 36 and is provided with an inlet has an inlet 40 open to the atmosphere and v is initially adjusted and locked in any suitable. known-manner to permit of a predetermined volume of air assing therethrough along the bore 22. T e' valve 19 will be.

moved by gravit to the lower end of the valve casmg 17; t at is, againstthe shoulder 21 when the'en no to which the device is p t is intended that the valve casing 17 'sliall'be, adjusted relatively to the end of the "boss 9 so as to be positioned at a predetermined distance from the latter, the particular adjustment being determined by the characteristics of the en ine with which the device is to be used. bviously when the engine isstarted, the suction on the valvecasing will draw air through the bore 22'into the valve casing and around the valve therein through the bore 11 and the duct.13. A carburetted mixture is passing from the carbureter 1 through the opening.

fi into the inlet ofthe intake manifold as indicated by the arrows in Figs. 1 and 4 of the drawings, and the air indrawn through the device will be discharged from the pro? jecting duct with a vortex motion in such manner as to be difiused through the mass of carbnretted mixture and thereby intimately commingled therewith. As the speed of the engine increases the suction created will be greater and will tend to lift the valve 19 from the shoulder 21 toward the end of the boss 9, thereby first increasing and then decreasing the volume of air indrawn. When thesuction is suflicient to draw the valve against the end of the boss 9, the volume of air permitted to enter the duct 13 will be limited to the capacity of thenotches 16--16 since the rounded end of the valve will close the outer end of the bore 11. In idle position the rounded opposite endv of the valve will cover the end of the bore 22, although a slight suction will be sufiicient to draw air through the bore 22 on account of the conformation of the valve 19. The latter has the corners thereof rounded or squared ofi slightly and is provided intermediately of its length with a circumferential groove 41. The valve 27 is fashioned similarly and is provided with a circumferential groove 42 intermediately of its length.

The fill tube 39 is designed for use in amas priming the engine to which the device is applied. lhe cook 37 is opened and a desired quantity of a hydrocarbon fuel is poured into the fill pipe and the engine is then started in the usual manner. The cock 37 is then adjusted to permit of a desired volume of air passing therethrough and during the further operation of the engine, air is drawn through'the fill tube 39, the cock 37, and the remaining parts which have been described as being arranged between the cock 37 and the boss 8 into the opening 6 for union with the carburetted mixture passing therethrough. If desired, the fill pipe 39 may be removed after the engine has been started.

Obviously a great economy in the use of fuel to develop a given amount of power is effected since a rich mixture will be supplied to the engine when the engine is being started or is operated under a heavy load while a mixture containing a greater percentage of air will besupplied as the speed of the engine is increased. Since the device is under the control of the engine the mixture will be varied as the s ed of the en- .ginc varies without any action on the part of the operator being required after the initial adjustments have. been accomplished.

Since the ducts 12 and 13 project into the opening 6 for an appreciable distance and are provided with flarin mouths, the air discharge'd'thereby into t e opening 6 will be difiused and thereby intimately commingled withthe carburetted mixture so as to provide a uniformly mixed combustible mixture. The ducts 12 and 13 ar by preference arranged so that the axes thereof if extended would meet at an angle of approximately with each other and substantially at the upper end of a-vertical diameter of the opening.

In Figure 6, we show a plate 50 which is adapted to be placed between the carbureter and intake manifold of engines-installed in automotive vehicles of certain types of construction. It will be observed that the plate 50 differs from the plate 5 in that two of the openings 6 are provided and that the duct 12 projects into one of the openings 6 while the duct 13 projects into the other.

The operation-of an embodiment of the invention in which the plate 50 is comprised is identical in essential respects with the operation of the embodiment of the invention illustrated in Fi s. l to 5 inclusive and hereinafter described. In consequence, a

. statement of the operation of the modified form is believed to be unnecessary herein.

Obviousl other modifications and adaptations of the forms of the device illustrated in the accompanying drawings may be provided without departing from the spirit and scope of our invention and we, therefore, consider as our own all such modifications and adaptations of the forms of the device illustrated and described as do not depart from the spirit and scope of our invention as outlined in the appended claims.

We claim: 1. In a'device of the character described, a tubular fluid intake element adapted to be supported with one end thereof in open communication with a source of suction and having diametrically opposite notches in the wall of the second end thereof, said notches extending from the bore of the tubular intake element to the outer wall thereof, a tubular valve casing having an inlet at one end and being provided with an internal annular shoulder adjacent to the inlet and facing in thedirection opposite to the inlet, means connecting the tubular fluid intake element to the valve casing so that the second end of the former is disposed within the latter in spaced confronting relation to the shoulder, and a valve slidably disposed in said valve casing and being adapted to be moved by gravity against said shoulder and by suction against the confronting end of said fluid intake element, said valve having the general shape of a triangular prism having the ends thereof rounded and having a circumferential groove in its wall intermediately of its ends.

2. An air mixing device comprising a plate adapted to b disposed between a carburetor outlet and an intake manifold and having an openin adapted to register sub stantially with tlde carburetor outlet, said plate also having two bores opening through the wall of the first named opening, and a pair of air conducting ducts each extending through one of said bores to terminate at their discharge ends beyond the wall of the opening and in the plane of the plate, the discharge ends of the ducts being set at an angle to each other so that the axes thereof intersect at a point beyond the extremities of said discharge end portions andthe lat ter being flared outwardly at their extrities.

HENRY HR. 7' JOSEPH GERMAN PINEAU. 

